Download PC – 66B/66H

User Manual for Handheld Pulse Oximeter
Instructions to User
Dear Customer,
Thank you for purchasing this quality product. Please read the
manual very carefully before using this device. Failure to follow
these instructions can cause measuring abnormality or damage to
the Oximeter.
No part of this manual may be photocopied, reproduced or
translated into another language without the prior written
consent. We reserve the right to revise and amend it at any time
without prior notice.
Version of the Manual: Ver 1.2
Issued Date: September 29, 2014
All rights reserved.
Notes:
z The contents contained in this manual are subject to change
without prior notice.
z Information furnished by Creative is believed to be accurate
and reliable. However, no responsibility is assumed by
Creative for its use, or any infringements of patents or other
rights of third parties that may result from its use.
3502-2490003
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User Manual for Handheld Pulse Oximeter
Instructions for Safe Operation
0 Check the device to make sure that there is no visible
damage that may affect user’s safety and measurement
performance. It is recommended that the device should
be inspected minimally before each use. If there is
obvious damage, stop using the device.
0 Necessary service must be performed only by qualified
technicians. Users are not permitted to service this
device.
0 The oximeter must not be used with the devices and
accessories not specified in User Manual.
Cautions
0 Explosive hazard—DO NOT use the oximeter in
environment with inflammable gas such as some
ignitable anesthetic agents.
0 DO NOT use the oximeter while the Patient is under
MRI or CT scanning. This device is NOT MRI
Compatible.
Warnings
0 Discomfortable or pain may occur if using the sensor of
this device continuously on the same location for a long
time, especially for the patients with poor
microcirculation. It is recommended that the Oximeter
should not be applied to the same location for longer than
2 hours or less if any abnormal condition is found.
Frequently check and re-position the Oximeter.
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User Manual for Handheld Pulse Oximeter
0 For the individual patients, there should be a more
prudent inspecting in the placing process. The sensor can
not be placed on the edema and tender tissue.
0 The local law should be followed when disposing of the
expired device or its accessories.
Attentions
Keep the oximeter away from dust, vibration, corrosive
substances, explosive materials, high temperature and
moisture.
If the Oximeter gets wet, please stop operating it and do
not resume operation until it is dry and checked for
correct operation. When it is carried from a cold
environment to a warm and humid environment, please
do not use it immediately. Allow at least 15 minutes for
the Oximeter to reach ambient temperature.
DO NOT operate the button on the front panel with sharp
materials or sharp point.
DO NOT use high temperature or high pressure steam
disinfection on the oximeter and probes. Refer to related
chapter for instructions regarding cleaning and
disinfection.
The intended use of this device is not for therapy purpose.
Declaration of Conformity
The manufacturer hereby declares that this device complies
with the following standards:
IEC 60601-1, ISO 9919:2009, ISO 80601-2-61:2011
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User Manual for Handheld Pulse Oximeter
and follows the
MDD93/42/EEC.
provisions of
the
council directive
Caution: U.S. federal law restricts this device to sale
or use by or on the order of a physician.
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User Manual for Handheld Pulse Oximeter
Table of Contents
1 Overview.................................................................................. 1
1.1 Appearance....................................................................... 1
1.2 Product Name and Model.................................................. 2
1.3 Structure............................................................................ 3
1.4 Features............................................................................. 3
1.5 Intended Use..................................................................... 3
1.6 Working Environment....................................................... 3
2 Installation of Battery and Holder........................................ 4
3 SpO2 Probe Connection.......................................................... 6
4 Operation................................................................................ 8
4.1 Power on/off the Oximeter................................................ 8
4.2 Default Display Screen..................................................... 8
4.3 Display Screen with PI Value......................................... 10
4.4 Menu Setup..................................................................... 10
4.5 Data Recall...................................................................... 16
5 Technical Specifications....................................................... 20
6 Over-limit Indication............................................................ 22
6.1 Limit settings.................................................................. 22
6.2 Alert sound mute setting................................................. 22
7 Accessories............................................................................. 23
8 Repair and Maintenance...................................................... 24
8.1 Maintenance.................................................................... 24
8.2 Cleaning and Disinfecting Instruction............................. 24
9 Troubleshooting.................................................................... 25
Appendix.................................................................................. 26
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User Manual for Handheld Pulse Oximeter
1 Overview
1.1 Appearance
DC power input
Data interface
Display Key
Power/Back
Navigation knob
Recall/Mute
Mode/OK
SpO2 probe
connector
Figure 1-1
1. Display screen: display SpO2 plethysmogram and parameter
values.
2. Navigation key:
¿ : Up/Left/Increase
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User Manual for Handheld Pulse Oximeter
Press this key, the default screen can be shifted to display pulse
rate (PR) or perfusion index (PI). If on the system setup screen,
press it to move the cursor upwards or to the left and adjust
parameter values.
À : Down/Right/Decrease
Its function is similar with the key “¿ : Up/Left/Increase”.
3.
(Mode/OK): press this key, the screen can be shifted
between default screen display and alternative screen display;
longtime press it, the menu screen will be displayed; when you
finish parameter setting, press this key to confirm.
4.
(Data interface): used for uploading data (Optional
function).
(DC power input): used for connecting external DC
5.
power input for recharging the built-in rechargeable battery.
(Power/Back): Power on/off the device by longtime
6.
pressing; short time press it to back to the previous level of menu
while setting menu operation.
7.
(Recall/Mute): Longtime press it to enter SpO2 trend data
recall screen; when the device is beeping, short time pressing
will mute the indication sound, the mute state will persist for
about 90s. After this mute period (90s), then the indication sound
will resume.
8. Icon: “SpO2”: SpO2 Probe Connector.
1.2 Product Name and Model
Name:
Handheld Pulse Oximeter
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User Manual for Handheld Pulse Oximeter
Model: PC-66B
1.3 Structure
It consists of the main unit and SpO2 probe.
1.4 Features
— It is lightweight, small in size and easy to carry
— Color LCD to display plethysmogram and parameters
— Monitor SpO2 and Pulse Rate simultaneously
— PI (Perfusion Index) display is available
— Up to 384 hours storage and recall of SpO2 and PR data.
— Audible and visual alert function is available
— Data transmission to PC for view and analysis (Optional)
— Power saving mode is available
1.5 Intended Use
This Handheld Pulse Oximeter is intended for measuring and
recording the pulse rate and functional oxygen saturation (SpO2).
It is applicable for monitoring SpO2 and pulse rate of adult and
pediatric patients in clinical institutions and homes.
1.6 Working Environment
Operating temperature:
5~40℃
Operating humidity:
30~80%
Atmospheric pressure:
70kPa~106kPa
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User Manual for Handheld Pulse Oximeter
2 Installation of Battery and Holder
1）Open the rear panel with coin or an ordinary flat
screwdriver, as shown in Figure 2-1.
Figure 2-1
2）AA Alkaline batteries or Lithium battery (optional):
① If AA alkaline batteries (non-chargeable) are provided, then
according to the polarity mark, insert three AA batteries into
battery house, as shown in Figure 2-2.
Figure 2-2
Figure 2-3 Fixing Holder
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User Manual for Handheld Pulse Oximeter
②
If Lithium battery (rechargeable) is provided, place the
lithium battery into the battery house, and insert its
terminal header into the corresponding connector in the
battery compartment.
3）Close the battery cover and lock it.
4）Fixing Holder, as shown in figure 2-3.
Notes: ① When the device is provided with AA alkaline
batteries and it shows low battery, the user should replace the
batteries in time.
② When the device is provided with lithium battery and it
shows low battery, the user should recharge the battery in time.
That is, connect one end of the charging cable to the device's
DC power input, and connect the other end to the USB power
(from PC or DC adapter). When the display screen appears the
rolling icon "
", it means the battery is charging; When the
screen shows icon "
", it means the battery is fully
charged. Pulling out the charging cable, then the above icon will
disappear.
0
Safety instruction for operation:
Do not throw the battery into the water, liquid and fire.
0
Keep the battery out of the reach of the child.
0
Do not disassemble the battery.
Please remove the battery and put it to specified condition if
the device will not be used for a long time.
If the battery is damaged, please replace it with the same
model AA alkaline battery or lithium battery provided by the
same manufacturer.
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User Manual for Handheld Pulse Oximeter
In order to prolong the lithium battery's using life, please pay
attention to the battery maintenance.
3 SpO2 Probe Connection
Connect the SpO2 probe to the connector labeled “SpO2” at the
right side of the Oximeter. After starting up the Oximeter, insert
one finger (index finger, middle finger or ring finger with
proper nail length) into the probe according to the
demonstration shown in the following figure.
Figure 3-1 Demonstration for Using SpO2 probe (finger clip)
Instructions of Operation
1. The finger should be put in properly and correctly.
2. Do not shake the finger and keep at ease during
measurement.
3. Do not put wet finger directly into sensor.
4. Avoid placing the sensor on the same limb which is wrapped
with a cuff for blood pressure measurement or during
venous infusion.
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User Manual for Handheld Pulse Oximeter
5. Do not let anything block the emitting light from the sensor.
6. Vigorous exercise and electrosurgical device interference
may affect the measuring accuracy.
7. Using enamel or other makeup on the nail may affect the
measuring accuracy.
8. If the first reading appears with poor waveform (irregular or
not smooth), then the reading is unlikely true, the more
stable value is expected by waiting for a while, or a
re-inserting finger is needed when necessary.
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User Manual for Handheld Pulse Oximeter
4 Operation
4.1 Power on/off the Oximeter
¾
When the device is off, press“
”power/back key
for 2 seconds to power up the Oximeter, then it will enter
into measurement display screen.
¾
If the Oximeter is working, longtime press “ ”
power/back key to power it off.
¾ During measurement, if the "probe off" is
detected for longer than one minute, then the
device will power off automatically.
¾ If not in the measurement state and there is no
any key operation for 1 minute, the device will
power off automatically as well.
4.2 Default Display Screen
Press “ ”power key for 2 seconds to start up the Oximeter,
then insert the finger into the rubber cushions of the probe, the
screen will display the default screen, as shown in Figure 4-1.
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User Manual for Handheld Pulse Oximeter
Figure 4-1 Default Screen
Description:
“
”: Memory full icon; if the memory is full, the memory
full icon "
" appears on the screen. No display of this icon
means the current storing space is not full. If the memory is
full, the data storing will continue in such way the new
record will overwrite the oldest record, so that it's
recommended to upload the stored data into the computer in
time.
During the measurement, short time press recall/mute "
"
key to turn off (or resume) the pulse beep sound, while the
pulse symbol "
" still blinks. For alert sound mute function,
refer to Section 6.2 for detail.
Note: The pitch tone of pulse beep (dididi...) is modulated by
the SpO2 value, that means the pitch tone changes when the
measured SpO2 changes. The higher the SpO2 value is, the
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User Manual for Handheld Pulse Oximeter
higher the tone frequency of pulse beep (sound becomes
sharper); The lower the SpO2 value is, the lower the tone
frequency of pulse beep (sound becomes flatter).
4.3 Display Screen with PI Value
On the default display screen, press “ ¿ / À ” Navigation key to
shift screens between default screen and display screen with PI
value. The display screen with PI value is shown below.
Figure 4-2 Display Screen with PI Value
4.4 Menu Setup
On the above mentioned screens, longtime press “
” key for
entering into setup menu screen (as shown in Figure 4-3).
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User Manual for Handheld Pulse Oximeter
Figure 4-3 Setup Menu Screen
Screen Description
¾
“Setting”: set parameter values, refer to Chapter 4.4.1 for
details.
¾
“Upload data”: enter into data uploading state, refer to
Chapter 4.4.2 for details.
¾
"Default": enter into the factory default setting, refer to
Chapter 4.4.3 for details.
¾
"简体中文": this Oximeter provides the display with two
languages: English and "简体中文"（Simplified Chinese）.
¾
“Version”: for viewing version number of the software,
refer to Chapter 4.4.5 for details.
4.4.1 Setting
On the menu screen, select “Setting” and then press “
” key
for entering into system setup screen. The setup screen is as
shown in the following figures.
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User Manual for Handheld Pulse Oximeter
Figure 4-4 System Setup Screen
Operation Instructions:
¾
Patient: according to the type of SpO2 probe, the matched
patient
type
should
be
selected,
there
are
two
options:"ADU " for adult, and "NEO " for neonate.
¾
SpO2 Lo-Limit: SpO2 low limit setting; range: 50%~99%,
the step is 1%. The factory default value for adult is 90%
and 85% for neonate.
¾
PR Hi-Limit: High limit setting of pulse rate; range:
100~240bpm. From 100 to 150, the step is 1bpm, and
from 150 to 240, the step is 5bpm. The factory default
value for adult is 120bpm and 160bpm for neonate.
¾
PR Lo-Limit: Low limit setting of pulse rate; range:
30~99bpm, and the step is 1bpm. The factory default
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User Manual for Handheld Pulse Oximeter
value for adult is 50bpm and 60bpm for neonate.
¾
Date: Date setting
1） When
cursor stays on the Year of the date, press “
”
(Mode/OK) key to active Year option, the cursor flashes on
the Year of the date;
2） Press
¿/À (Navigation key) to adjust year.
3） Press
“ ” (Power/back) key or “
confirm and exit from date setting.
” (Mode/OK) key to
4） The
procedures of adjusting Month value and Day value
are the same with Year adjustment.
Date Format: yy-mm-dd
Note: The setting operations of other parameters (such as TIME,
PATIENT, RECORDING INTERVAL, POWER SAVING etc.)
are the same with date setting.
¾
Time: Time setting
¾
Recording: Time interval for recording data (SpO2 &
PR), there are five options: “1s, 2s, 4s, 8s” and “OFF”.
1) "1s": the least length of data record is set to 30 seconds, and
the maximal length for one record is limited to 1 hour. The
total storage time is up to 48 hours.
2) "2s": the least length of data record is set to 60 seconds, and
the maximal length for one record is limited to 2 hours.
The total storage time is up to 96 hours.
3) "4s": the least length of data record is set to 120 seconds,
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User Manual for Handheld Pulse Oximeter
and the maximal length for one record is limited to 4 hours.
The total storage time is up to 192 hours.
4) "8s": the least length of data record is set to 240 seconds,
and the maximal length for one record is limited to 8 hours.
The total storage time is up to 384 hours.
5) When the option is set to “OFF”, the device will not store the
measuring data.
¾
Power saving: power saving setting; two options: "on"
and "off". The factory default setting is "on". If the power
saving mode is on during measurement, and there is no
key operation for 2 minutes, the screen display will be
dim for power saving. The display brightness will resume
to normal condition by pressing any key.
¾
Volume (optional): 3 levels setting: "1", "2" and "3",
corresponding to the speaker volume icons of " ", " "
and "
" respectively. The speaker volume icon indicates
the volume of any sound generated by the device for
key clicks, over-limit alerting, pulse beep and audible
probe-off indication etc..
4.4.2 Upload Data
On the menu screen, select “UPLOAD DATA” and then press
“
” key for entering into connecting status (as shown in
Figure 4-5).
Note: Make sure the provided USB data cable is well connected
between the device and PC before uploading data.
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User Manual for Handheld Pulse Oximeter
When you transmit data (SpO2 and PR values) to your computer,
please let the oximeter stay in connecting status. Do the
following operation by the instruction in “Oximeter Data
Manager User Manual”. The data uploading will be activated.
Figure 4-5 Connecting Status Screen
4.4.3 Default
On the menu screen, select "Default " and then short time press
"
"key for entering into default setting screen (as shown in
Figure 4-6). Press the Navigation "
" key to choose "Yes"
or "No", and press " " mode/OK key to confirm or exit. Short
time press " " power/back key to return to the previous menu
screen.
Figure 4-6 Default Setting Screen
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User Manual for Handheld Pulse Oximeter
4.4.4 Language Selection
¾
In Simplified Chinese version: on main menu screen,
select "English" and then short time press "
" key, the
display language changes to English.
¾
In English version: on main menu screen, select
"Simplified Chinese" and then short time press " " key,
the display language changes to Simplified Chinese.
4.4.5 Version
On the menu screen, select “VERSION” and then press “
key for entering into version screen (as shown in Figure 4-7).
”
Figure 4-7
4.5 Data Recall
On the default display screen, longtime press “
key to enter into record list display screen.
16
” ( Recall/mute)
User Manual for Handheld Pulse Oximeter
Figure 4-8 Record List
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User Manual for Handheld Pulse Oximeter
4.5.1 Data Recall
Choose record in the record list, then press “
”(mode/OK)
key, the display screen will display trend graph, as shown in
Figure 4-9A.
Figure 4-9A Trend Graph Display Screen
Operation Instructions:
” mode/OK key to shift the trend graph
z Short time press “
screens (as shown in Figure 4-9A , Figure 4-9B and Figure
4-9C)
z Short time press "
screen.
" power/back key to return to record list
Figure 4-9B Trend Graph Display Screen
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User Manual for Handheld Pulse Oximeter
Figure 4-9C Trend Graph Display Screen
4.5.2 Data Deletion
On the menu screen, longtime press “
” key and the records
list will appear. At this time, longtime pressing “
” key again,
an message “Are you sure to delete all?” prompts on the screen,
as shown in Figure 4-10.
Figure 4-10
At this time, press
"" navigation key to select “Yes” or
"No", and press “ ” mode/OK key to confirm or exit. Or short
time press " " power/back key to return to record list screen.
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User Manual for Handheld Pulse Oximeter
5 Technical Specifications
A. Display Mode: Color dot-matrix LCD;
B.
Power Supply:
Supply voltage: d.c. 4.5V(3 AA alkaline batteries),
or d.c. 3.6V (Lithium rechargeable battery)
Operating current: ≤180mA
C. SpO2 Measurement
Transducer: dual-wavelength LED sensor with wavelength:
Red light: 663 nm, Infrared light: 890 nm.
Maximal optical output power:
< 2mW maximum average
Measuring range: 35~100%
Measuring accuracy:
Not greater than 3% for SpO2 range from 70% to 100%
*NOTE: Accuracy defined as root-mean-square value of
deviation according to ISO 9919.
Low limit setting range: 50%~99% (Default setting: 90%).
D. Pulse Rate Measurement
Measuring range: 30bpm~240bpm
Accuracy: ±2bpm or ±2% (whichever is greater)
Over-limit setting range: 25bpm~250bpm
Default setting limit: High -- 120bpm, Low -- 50bpm
E. Perfusion Index Display
Range: 0.2%~20%
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User Manual for Handheld Pulse Oximeter
F. Data Update
8 beats moving average for both SpO2 and pulse rate readings
G. Data Storage
Recording SpO2 and pulse rate data every 1/2/4/8 second(s),
up to 384–hour records can be stored.
H. Low Perfusion Performance
The accuracy of SpO2 and PR measurement still meet the
precision described above when the modulation amplitude
is as low as 0.5%.
I. Resistance to interference of surrounding light:
The difference between the SpO2 value measured in the
condition of indoor natural light and that of darkroom is
less than ±1%.
J. Dimensions: 145 mm (L) × 74 mm (W) × 29 mm (H)
Net Weight: 210g (including batteries)
K. Classification
Type of protection against electric shock:
Internally powered equipment
Degree of protection:
Type BF applied parts.
Degree of protection against harmful ingress of liquids:
Ordinary equipment without protection against ingress of
water.
Electro-Magnetic Compatibility: Group I, Class B
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User Manual for Handheld Pulse Oximeter
6 Over-limit Indication
6.1 Limit settings
¾
¾
SpO2 low limit setting range: 50% ~ 99%.
Pulse Rate limits setting range:
High: 100bpm--240bpm Low: 30bpm--99bpm
During the measurement, if the measured value exceeds the
preset value, the alert beeping sound will be activated, the value
that is over-limit will blink at the same time.
6.2 Alert sound mute setting
¾
During the measurement, if the alert sound is set to on,
short time press " " recall/mute key, then the alert sound
will mute for 90 seconds, but the over-limited value still
keeps blinking. At this moment, the speaker volume icon
becomes " ". If this alert event persists over 90 seconds,
then the alert sound will be activated again.
¾
During the measurement, if the probe is off or
disconnected, the message "Check Probe" shows on the
display screen. The alert sound starts (interval is 5
seconds) and lasts for about 1 minute. If the probe is still
off, the Oximeter will power off automatically.
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User Manual for Handheld Pulse Oximeter
7 Accessories
1. A probe
2. A holder
3. Battery（AA）× 3
4. Charging cable (optional)
5. User Manual
6. Quality Inspection Certificate
7. A data cable (optional)
8. Oximeter Data Manager software (optional)
Note: The accessories are subject to change. See the Packing List
for detailed items and quantity.
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User Manual for Handheld Pulse Oximeter
8 Repair and Maintenance
8.1 Maintenance
The expected service life(not a warranty) of this device is 5
years. In order to ensure its long service life, please pay
attention to the maintenance;
y Please change the batteries when the low-voltage indicator
appears.
y Please take out the batteries if the oximeter will not be
used for a long time.
y The recommended storage environment of the device:
Ambient temperature: -20ºC ~60ºC
Relative humidity 10%~95%
Atmospheric pressure: 50kPa~107.4kPa
y The oximeter is calibrated in the factory before sale, there
is no need to calibrate it during its life cycle.
However, if it is necessary to verify its accuracy routinely,
the user can do the verification by means of SpO2
simulator, or it can be done by the local third party test
house.
8.2 Cleaning and Disinfecting Instruction
y Surface-clean sensor with a soft cloth by wetting with a
solution such as 75% isopropyl alcohol, if low-level
disinfection is required, use a 1:10 bleach solution.
y Then surface-clean by a dampened cloth and let it air dry
or wipe it with a cloth.
High-pressure disinfection cannot be used on the device.
Do not immerse the device in liquid.
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User Manual for Handheld Pulse Oximeter
9 Troubleshooting
Trouble
Possible Reason
Solution
Unstable
SpO2 and
Pulse
Rate
display
1. The finger is not
placed far enough
inside.
2. The finger is
shaking or the
patient is moving.
1. Place the finger
correctly inside and try
again.
2. Reduce patient
movement.
Device
will not
switch on
1. The batteries are
drained or almost
drained.
2. The batteries are
not inserted
properly.
3. The device is
malfunctioning.
1. Change batteries.
2. Reinstall batteries.
3. Please contact the
local service center.
No
Display
1. The device will
power off
automatically when
there is no signal
1. Normal.
and no operation for 2. Change batteries.
1 minute.
2. The batteries are
almost drained.
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User Manual for Handheld Pulse Oximeter
Appendix
Key of Symbols
Description
Symbol
%SpO2
Symbols
PI%
The oxygen saturation
Perfusion Index
Pulse rate (Unit: beats per minute)
on the
Low battery voltage
screen
Battery fully charged icon
Speaker mute icon
/ /
Speaker volume icon
Memory full
/
(Neonate/Adult) Patient type
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User Manual for Handheld Pulse Oximeter
Symbol
SpO2
Description
SpO2 probe connector
Power/Back Key
Mode/OK Key
Symbols
on the
panels
Recall/Mute Key
¿/À
Navigation Key
Data Interface
CE mark
Serial number
Date of manufacture
Authorised representative in the
European community
Manufacturer (including address)
With Type BF applied part
See User Manual
Disposal of this device according
to WEEE regulations
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User Manual for Handheld Pulse Oximeter
Common Knowledge
1 Meaning of SpO2
SpO2 is the saturation percentage of oxygen in the blood, so
called O2 concentration in the blood; it is defined by the
percentage of oxyhemoglobin (HbO2) in the total
hemoglobin of the arterial blood. SpO2 is an important
physiological parameter to reflect the respiration function; it
is calculated by the following method:
SpO2 = HbO2/ (HbO2 +Hb)×100%
HbO2 are the oxyhemoglobins (oxygenized hemoglobin),
Hb are those hemoglobins which release oxygen.
2 Principle of Measurement
Based on Lamber-Beer law, the light absorbance of a given
substance is directly proportional with its density or
concentration. When the light with certain wavelength
emits on human tissue, the measured intensity of light after
absorption, reflecting and attenuation in tissue can reflect
the structure character of the tissue by which the light
passes. Due to that oxygenated hemoglobin (HbO2) and
deoxygenated hemoglobin (Hb) have different absorption
character in the spectrum range from red to infrared light
(600nm~1000nm
wavelength),
by
using
these
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User Manual for Handheld Pulse Oximeter
characteristics, SpO2 can be determined. SpO2 measured
by this oximeter is the functional oxygen saturation -- a
percentage of the hemoglobin that can transport oxygen. In
contrast, hemoximeters report fractional oxygen saturation
– a percentage of all measured hemoglobin, including
dysfunctional hemoglobin, such as carboxyhemoglobin or
metahemoglobin.
Clinical application of pulse oximeters: SpO2 is an
important physiological parameter to reflect the respiration
and ventilation function, so SpO2 monitoring used in
clinical becomes more popularly, such as monitoring the
patient with serious respiratory disease, the patient under
anesthesia during operation, premature and neonate. The
status of SpO2 can be determined in time by measurement
and find the hypoxemia patient earlier, thereby preventing
or reducing accidental death caused by hypoxia effectively.
3 Normal SpO2 Range and Default Low Limit
In campagna area, healthy people’s SpO2 value is greater
than 94%, so the values below 94% are determined as
hypoxia. SpO2<90% is considered as the default threshold
for determining anoxia by most researchers, so SpO2 low
limit of the oximeter is set as 90% generally.
4 Factors affecting SpO2 accuracy (interference reason)
—
Intravascular dyes such as indocyanine green or
methylene blue
—
Exposure to excessive illumination, such as surgical
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User Manual for Handheld Pulse Oximeter
lamps, bilirubin lamps, fluorescent lights, infrared
heating lamps, or direct sunlight.
—
Vascular dyes or external used color-up product
such as nail enamel or color skin care
—
Excessive patient movement
—
Placement of a sensor on an extremity with a blood
pressure cuff, arterial catheter, or intravascular line
— Exposure to the chamber with High pressure
oxygen
— There is an arterial occlusion proximal to the sensor
—
Blood vessel contraction caused by peripheral vessel
hyperkinesias or body temperature decreasing
5 Factors causing low SpO2 value (pathology reason)
—
Hypoxemia disease, functional lack of HbO2
—
Pigmentation or abnormal oxyhemoglobin level
—
Abnormal oxyhemoglobin variation
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Methemoglobin disease
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Sulfhemoglobinemia or arterial occlusion exists near
sensor
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Obvious venous pulsations
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Peripheral arterial pulsation becomes weak
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Peripheral blood supply is not enough
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